Service Manual Model Plus 4 Computer Preliminary (1984-10)(Commodore)[PN-314001-04]

SERVICE MANUAL
MODEL PLUS 4 COMPUTER

Preliminary
OCT. 1984 Phi -31 4001 -04

C~ commodore

COMPUTERS

SERVICE MANUAL
MODEL PLUS 4 COMPUTER

Preliminary
OCT. 1984 PN-31 4001-04

Commodore Business Machines, Inc.

1200 Wilson Drive, West Chester, Pennsylvania 19380 U.S.A.

Commodore makes no expressed or implied war-
ranties with regard to the information contained
herein. The information is made available solely on
an as is basis, and the entire risk as to quality and
accuracy is with the user. Commodore shall not be
liable for any consequential or incidental damages
in connection with the use of the information con-
tained herein. The listing of any available replace-
ment part herein does not constitute in any case
a recommendation, warranty or guaranty as to
quality or suitability of such replacement part.
Reproduction or use without expressed permission,
of editorial or pictorial content, in any matter is
prohibited.

This manual contains copyrighted and proprietary information. No part
of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical,
photocopying, recording or otherwise, without the prior written permis-
sion of Commodore Electronics Limited.

Copyright © 1984 by Commodore Electronics Limited.
All rights reserved.

CONTENTS

Title Page

SPECIFICATIONS 1

OVERVIEW 2

PRODUCT PARTS LIST 3

CASEWORK IDENTIFICATION 3

PCB LAYOUT 4

PCB PARTS LIST 5

PCB SCHEMATIC DIAGRAMS 7

KEYBOARD MATRIX 7

I.C. PINOUTS FOR UNCOMMON CHIPS 9

RF MODULATOR 251844 LAYOUT 1 1

251844 SCHEMATIC 11

RF MODULATOR 251311 LAYOUT 12

251311 SCHEMATIC 12

iii/iv

PLUS 4 PRODUCT SPECIFICATION

MEMORY

64K RAM. 60K RAM User accessible for BASIC programs.

ROM

32K ROM Standard (includes operating system and BASIC interpreter) with 32K additional ROM con-
taining the built-in productivity software.

MICROPROCESSOR

7501 Microprocessor — .89 or 1.76 MHz clock.

DISPLAY

40 Columns x 25 lines of text.

COLORS

128 Colors (16 colors; 8 luminance levels).

CHARACTERS

Upper & lower case letters, numerals and symbols. Reverse and flashing charachters. All PET graphic
characters.

DISPLAY MODES

Text characters. High resolution graphics. Split screen text/high resolution graphics. Multicolor graphics.

RESOLUTION

320 x 200 Pixels

SOUND

2 Tone generators or 1 Tone and 1 white noise generator.

VOLUME

8 Volume levels

KEYBOARD

Full size typewriter style design

KEYS

67 Keys total. 4 Cursor control keys. 4 Programmed (reprogrammable) function keys (up to 8 user
defined functions possible). Color control keys. HELP key. Upper and lower case character set. Graphics
character set.

INPUTS/OUTPUTS

PLUS/4 MODEM (User) port. Serial port. ROM cartridge and parallel disk drive port. 2 Joystick ports.
C1531 Cassette drive interface port. RF Output-channel 3 or 4. Video output-composite/
chrominance/luminance. Audio input/output. Power supply input.

PLUS 4 PRODUCT SPECIFICATION (Continued)

FEATURES

Built-in extended BASIC 3.5 — over 75 commands. Built-in Machine Language monitor — over 12
commands. Built-in graphics and sound commands. Screen window capability. Reset button (Warm
start). Built-in integrated productivity software.

PERIPHERALS

C1 551 Fast Disk drive, C1 531 Datasette, MPS 802 Dot matrix printer, MPS 803 Dot matrix printer,
DPS 1101 Daisy wheel printer, C1802 color monitor.

OTHER PERIPHERALS

C1541 Disk drive, MPS 801 Dot matrix printer, C1702 color monitor.

PLUS 4 OVERVIEW

The Plus 4 system is based on the 7501 microprocessor, an HMOS version of the 6510. Video pro-
cessing is achieved by the 7360 TED chip. 64K bytes of dynamic RAM are accomplished by 8 (64K
x 1 ) I.C.'s. (See page ). The system program is contained in 2 (1 6K x 8) ROMs. The system supports
up to 128K x 8 of ROM banked in 16K sections. By software control, through the 7360, ROM can
be completely banked out and RAM banked in for a true 64K of RAM (minus 256 byte pages), allow-
ing 60,671 bytes available for BASIC.

Keyboard and joystick scanning are accomplished by outputting the row data on the data bus while
addressing a particular register in the TED chip. This will in turn cause the TED chip to latch the column
information.

A standard serial port supports serial bus peripherals such as the 1541 disk drive and the various
serial printers. A cassette port is provided and the expansion port supports ROM cartrdiges. TTL serial
ASCII is intended to drive an RS-232 adapter.

PARTS LIST
PLUS/4

TOP CASE ASSY

Top Case

Keyboard, 67 Key, KKR-I

Nameplate

Shield Clip, R

Shield Clip, F

C

c
c
c
c

251453-01
251501-01
251655-01
251855-01
251856-01

BOTTOM CASE ASSY

Bottom Case
Foot, Self-Adhesive
Paper Shield
Shield Chip
Shield Plate
Insulation Sheet

c
c
c
c
c
c

251454-01
950157-04
310156-01
310199-01
310197-01
310198-01

ACCESSORIES

Users Manual
Power Supply
RF Cable
Switch Box

C
C
C
C

310196-01
310157
326189-02
904778-01

C — Commodore Stock Part

m

A

llllllllllllllllll

3

iL»*Jlr

^

(■I mini 'K : ji ;ii m :ai ill lai Jiiii x u m

' W11M1I 111 lllill HI 111 it; .

#»

Plus 4 Casework Identification

INSULATION
TUBING
2PL

PUT TO USE FB39
FB40

cn5

DETAIL D
SOLDERING SIDE

SEE NOTE 1

c

DETAIL A

SOLDER
3 PL

PCB 1

BEND LEGS - 2 PLS
BOTTOM VIEW FOR M1

SOLDER

Y2

BARE
BUSS-
WIRE

SIDE VIEW "A-A'
OF CN8

±=±

DETAIL E

I. JUMPER SELECTION FOR "J7"

- DOESN'T MATTER FOR UTSC (-OI).

- SHORT FOR G-PAL L-OZ).

- OPEN FOR I -PAL t-OS).

NOTES- UNLESS OTHERWISE- SPECIFIED:

PCB

Plus 4 PCB Assembly

PARTS LIST - PLUS/4 PCB ASSEMBLY #310163-01

PLEASE NOTE:

Commodore part numbers are provided for reference only and do not indicate the
availability of parts from Commodore. Industry standard parts (Resistors, Capacitors,
Connectors) should be secured locally. Approved cross-references for TTL chips,
Transistors, etc. will be available in manual form through the Service Department
in November of 1 984. Unique or non-standard parts will be stocked by Commodore
and are indicated on the parts list by a "C".

INTEGRATED CIRCUITS

DIODES (Continued)

U1

U2

U3
U4
U5

U6

U7

U8

U9-10

U11-18

U19

U20

U21

U22

U23

U24

U25

U26

U27

7360 VLSI, Text Dislay (TED)
Sub: C 251535-01

8360 C 251535-02

7501 Custom Microprocessor

C 251536-01
6551 A (Synertek) 901895-02

74LS08 901521-03

6529B Single Port Interface

C 251640-03

901521-02

901522-06

901523-01

901521-57

901505-01

C 251641-02

901521-18

901521-34

901521-22

C 318006-01
23128 ROM TED Kernal

C 318005-04
23128 FUNCTION ROM, 3+1 LOW

C 317053-01
23128 FUNCTION ROM, 3 + HIGH

C 317054-01
6529B Single Port Interface

C 251640-03

74LS04

7406

555

74LS257

4164-2 D-RAM

7700-010 PLA

74LS139

74LS175

74LS27

231 2B ROM TED Basic

TRANSISTORS

Q1-Q3
Q4

2SC 1815
2SD 880
Tip 29A
2SD 1266

902693-01
902694-01 Sub:
902653-01 Sub:

902694-04

DIODES

CR1

Bridge Rectifiers S2VB10 Sindengen
215026-01 Sub:

Bridge Recitifers DBA20B Sanyo

251026-02 Sub:

CR1
(cont.)
CR2
CR 11-20

Bridge Rectifiers DBA20C
Sanyo 251026-03

Diode, Zener RD 6.8 EB 900927-01
Diode, IN 914 Sub: 900850-16

Diode, IN 4148 Taping

251819-21 Sub:
Diode, IN 4148 900850-01

RESISTORS — All values are in ohms- 1/4 W
5% unless noted otherwise.

R1

R2

R3

R4

R5

R6

R7

R8

R9

R10

R11

R12

R13

4.7K

10K

470K

220K

18K

1.5K

470K

100K

1K

1K

12K

10K

1K

R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25

240

250

100K
1.5K
47K

100K
3K
1K
1K
1K
1K
1K

RESISTOR PACK

RP1, 2
RP3, 4

3.3K, 6 PIN

68, 8 PIN 4 ISOLATED

902441-29
326149-06

CAPACITORS

C1

C2

C3

C4

C5-C6

C7

C8

C9

C10

C11

Elect

Ceramic

Film

Film

Ceramic

Elect

Elect

Ceramic

Trimmer

Ceramic

0.1 /*F 25V
0.1 /if 25V
0.22 /*F 100V
0.22 iiF 100V
0.22 /*F 50V
2200 /if 16V
10 nF 16V
0.1 iiF 25V

40 pF

22 pF 50V

900100-40
251075-06
900150-11
900150-11
900022-01
900101-33
900100-25
251075-06
251029-02
251070-14

PARTS LIST - PLUS/4
PCB ASSEMBLY #310163-01 (Continued)

CAPACITORS (Continued)

MISCELLANEOUS (Continued)

C12

Ceramic

220 pF 50V

Sub:

FB2-14

Ferrite bead 325563-01

251071-26 Sub:

FB 15-21

Ferrite bead 903025-01

Ceramic

220 pF 50V

900463-08

FB22-26,

C13

Ceramic
Sub:

1 50 pF 50V

251071-24

FB28-38,
FB40

Ferrite bead 325563-01

Ceramic

1 50 pF 50V

900462-41

FB41-58

Ferrite bead 903025-01

C14

Ceramic

0.1 /tF 25V

251075-01

FB59

Ferrite bead 325563-01

C15-C16

Ceramic

0.1 /tF 25V

251075-06

FB60

Ferrite bead 903025-01

C17-C18

Ceramic

10 /tF 16V

900100-25

FB61-63

Ferrite bead 325563-01

C19

Ceramic

0.01 /tF 25V

251075-01

FB64-65

Ferrite bead 903025-01

C20

Elect

10 /tF 16V

900100-25

C21

Ceramic

0.1 /tF 25V

251075-06

EM1,2

EMI Filter 251842-01

C22

Elect

10 /tF 16V

900100-25

C23

Elect

1 /tF 16V

900100-16

CN1

Connector 4 PIN (power supply)

C24-C26

Ceramic

0.1 /tF 25V

251075-06

C 251614-01

C27

Elect

10 /tF 16V

900100-25

CN2

Connector 6 PIN DIN (serial bus)

C28-C29

Ceramic

0.1 /tF 25V

251075-06

C 903361-01

C30

Elect

10 /tF 16V

900100-25

CN3

Connector 7 PIN MINI DIN (cassette)

C31-C32

Ceramic

0.1 /tF 25V

251075-06

C 251616-01

C33-C40

Ceramic
Sub:

0.22 /tF 25V

251075-07

CN4

Connector 50 PIN Female Edge
(exoab) C 251630-01

Ceramic

0.22 /tF 50V

900022-01

CN5-6

Connector 8 PIN MINI DIN

C41-C51

Ceramic

0.1 /tF 50V

900020-06

(joy 1 & 2) C 251259-01

Sub:

CN7

Connector 8 PIN DIN (audio/video)

Ceramic

0.1 /tF 50V

9000010-01

325573-01

C100

Ceramic

0.1 /tF 50V

900010-20

CN8

Connector 18 PIN (keyboard)

C 251841-01

MISCELU

kNEOUS

L1
L2

Noise Filter 251264-01
Line Filter 906127-01

Y1

Crystal 14.31818 MHZ

251081-01

Sub:

Crystal 14.31818 MHZ

251081-02

Sub: 251701-01
Sub:

Y2

Crystal

1 .8432 MHZ

900555-02

L3,L3

Coil Inductor 1 .2 uHpt 901152-01

SW1

Switch, Rocker

C 251587-01

Sub: 325570-01

SW2

(PC Mount)
Switch, Push Button

C 251260-01

F1

Fuse 250V 1.5A 903556-18
Fuse Clip 906102-01

M1

RF Modulator

C 251844-01

Cartridge Guide 310171-01
Shield Box C 310172-01

Sub:

RF Modulator

251311-01

Shield Cap C 310173-01

C — Commodore Stock Part

R2I IK

'W 0+5V

RE.

®-
©-
©-

©-
©-

&
<&

&
d>

RI8 A1K

<>

-e

-e

-o

-e

-o

cO-

DEL

© ® ® ® © @

CLR

W

<>

■<)-

<h

RETURN

CTRL

<>

RUN
STOP

SHIFT

N

■O

<¥

/

-&

SPACE

B

M

<>

<>

ESC

f1

H

<>

K

-O

f2

-O

U

■O

+

f3

-O

SHIFT LOCK
_ SW

8

-^

HELP

-AA/V-

<£OIN-

1

40

RDY-

2

39

IRQ-

3

38

AEC-

4

37

VCC-

5

36

A0-

6

35

A1-

7

34

A2-

8

33

A3-

9

32

A4-
A5-

11 7501 30

A6-

12

29

A7-

13

28

A8-

14

27

A9-

15

26

A10-

16

25

A11-

17

24

A12-

18

23

A13-

19

22

GND-

20

21

RES
-R/W

DO

D1

D2

D3
-D4

D5
-D6
-D7

P0
■P1
■P2
-P3
-P4
-P5
-P6
■GATE
-A15
-A14

PIN ASSIGNMENT

U2-251 536-01

CUSTOM MICROPROCESSOR

KEYBOARD MATRIX

A2

A1-

A0-

VDD-

CS0-

CS1-

R/W-

IRQ-

MUX-

RAS-

CAS-

<t>0 -

COLOR-

CLK IN-

K0-

K1-

K2-

K3-

K4-

K5-

K6-

K7-

SYNC-

VSS-

1

48

2

47

3

46

4

45

5

44

6

43

7

42

8

41

9

40

10

39

]\ 7360 38

13

36

14

35

15

34

16

33

17

32

18

31

19

30

20

29

21

28

22

27

23

26

24

25

-A3
-A4
-A5
-A6
-A7
-A8
-A9
-A10
-A11
-A12
-A13
-A14
-A15
-AEC
-BA
-SND
-D7
-D6
D5
-D4
-D3
-D2
-D1
-D0

PIN ASSIGNMENT

U1 -251 535-01

VLSI, TEXT DISPLAY

(TED)

R/W
A0 -AI5

CLK IKI

R/W

COLOR

Plus 4 Schematic #310164 (1 of 4)

M 1 SCHEMATIC ON PAGE 11

PIN
CONFIGURATION

vss-

1

28

-R/W

CS0-
CS1-

2
3

27
26

-02
-IRQ

RES-

4

25

-D7

RXC-

5

24

-D6

XTL1-

6

23

-D5

XTL0-
RTS-

7
8

6551

22
21

-D4
-D3

CTS-

9

20

-D2

TXD-

10

19

-D1

DTR-

11

18

-D0

RXD-

12

17

-DSR

RSO-

13

16

-DCD

RS1-

14

15

-VCC

U3-901 895-02

ACIA

SYNERTEK

SYP6551A

2 MHZ

PIN

1

:oni

FIGURATION

I

FE-

1

28

-VCC

17-

2

27

-18

16-

3

26

-19

15-

4

25

-110

14-

5

24

-111

13-

6

23

-112

12-

7

22

-113

11-

8

21

-114

10-

9

20

-1115

F7-

10

19

-CE

F6-

11

18

-F0

F5-

12

17

-F1

F4-

13

16

-F2

GND-

14

15

-F3

U19-251641-02
PLA

.1/4 t

+5V O-

L4
\.ZmH

stttl

TRANSMIT/RECIEVE CHARACTERISTICS

LUM
COLOR

5NJD

CHARACTERTISTICS

SYM

-02
2 MHZ

UNIT

MIN

MAX

TRANSMIT/RECEIVE
CLOCK RATE

*CCY

400

—

ns

TRANSMIT/RECEIVE
CLOCK HIGH TIME

*CH

175

—

ns

TRANSMIT/RECEIVE
CLOCK LOW TIME

*CL

175

—

ns

XTL1 TO TXD
PROPAGATION DELAY

l DD

—

500

ns

RTS PROPAGATION
DELAY

l DLY

—

500

ns

IRQ PROPAGATION
DELAY (CLEAR)

^RQ

—

500

ns

RI0

IK

RB «

R1
IK

-AAAr-

CIS.

16V r
CI7

Ml

RF

MODULATOR RF OUT

LUM IN

COLOR IN LUM OUT

SWD COLOR OUT

f &ND COMP OUT

Rll

I2K

LUM

FB3

COLOR

FB4

COMP

FB5

H=>

5MD

FB6

(tr f tf = 1 to 30 ns)
'The Baud Rate with External Clocking is:
BAUD RATE 1

16 x T

CCY

Yl
I4.3I8I8MHH. NT5C
17.73447 MHZ PAL
6> 32 pf C L

R2
I0K

□

4-2jfpf ;f"

r.

i

33 pi

R3
470Jl_

CK t

R5
IBK

R7
470.O.

= ci5 . L ?£- H T -U-/

Ot5V

•I Tvi

r i

CLK IM

,M H — ly

PCLflRIS < ICl/ -i-

Q2
25CI8I5

FBT

F66

MC-

NC-

2SCI8I5 S |.5K

> Rl J-CI2 r

> 4.7K T 220 P f

4- <» <>

-I- CO . >

J l50 P f *

i

+ 5V <

R4
220.n_

C5T RD

PIN
CONFIGURATION

C5T WRT

FB<>

FBI0

FBI I

-CZh

C5T SENSE

C5T MTR

cs

R/W

D0-D7

L

L

DATA BUS
TO PORT

L

H

PORT TO
DATA BUS

H

X

ISOLATION

L = LOW LEVEL
H = HIGH LEVEL
X = IRREVELANT

R/W
P0
P1

P2-I
P3
P4-
P5-
P6-
P7-

VSS-

1
2
3
4
5
6
7
8
9
10

6529

20
19
18
17
16
15
14
13
12
11

VDD
-CS
-DB0
-DB1
-DB2
-DB3
-DB4
-DB5
-DB6
-DB7

Ot5V

t6V RE6
«t I.1AMP

CM I

POWER
7 PIN DIN

q VAC
Ml.PAAC

MOS

6529B

3 MHz

U5/U2 7-25 1640-03

SINGLE PORT

INTERFACE

+ SV o-

l/fc 740(»

RI7
|.5K

ut>qJ

FBI2

FBI3

ft

Q4
25D880

FBI4

^CR

CR2
8V

A0-AI5

D0-D7

E*T AUDIO

CI LOW
BRE5ET
RA5
0o

IRS
R/W

C HIGH

CE LOW

^ HISW

C5T

l!AS

MUX

BA

AEC

A0

A2

A3

A4

A5

AG

A7

A8

AS

Al#

All

AI2

AI3

AI4

AI5

P0

Dl

D2

D3

D4
D5

DQ>

D7

FBI5

■o

FBIC

-a

FBI7

(RAMbN) WC
+ 5VO-

FB5S

WC
NIC-

Plus 4 Schematic #310164 (2 of 4)

8

U3, U5, U19 PINOUTS ON PAGE 8

PIN
CONFIGURATION

NC-
DIN -

WE -
RAS-

A0-

A2

A1
VCC

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10
9

-VSS

-CAS

-DOUT

-A6

-A3

-A4

-A5

-A7

U11 ~ 18

64K DYNAMIC RAM

901 505-01

WE

RAS<

CAS

R/W CLOCK
GENERATOR

RAS CLOCK
GENERATOR

-Ml

CAS CLOCK
GENERATOR

(0
iu
W
CO

UJ

cc
Q

a
<

x

CO

UJ

K

A7o
< A6o—

AO

Mi

LS

0)

AC
UJ

3
00

0)
UJ

cc

Q
Q

<

COMMODORE

PART

NUMBER

APPROVED
SOURCE 1
OF SUPPLY

VENDOR

PART
NUMBER

ACCESS
TIME
(ns)

CYCLES

(ns)

POWER

ACTIVE
(MW)

STANDBY

(MAXHMW)

901505-01

HITACHI

HM4864-3

200

335

330

20

901505-01

NEC

/iPD4 164-2

200

375

250

28

901505-01

MITSUBISHI

M5K416NS-20

200

330

275

28

901505-01

MOSTEK

MK4564N-20

200

345

300

22

901505-01

OKI

MSM3764-20

200

330

248

23

901505-01

MICRON
TECHNOLOGY

MT4264-3

200

385

300

30

901505-01

HITACHI

HM4864P-3

200

335

330

20

901505-01

MATSUSHITA
(PANASONIC)

MN4164P-20

200

330

275

27.5

901505-01

SIEMENS

HYB4 164-3

200

330

150

20

901505-01

SHARP

LH2164-Z1

200

330

248

28

901505-01

HITACHI

HM4864AP-3

200

330

242

20

901505-01

TOSHIBA

TMM4164AP-20

200

330

275

22

R/W SWITCH

CO

MEMORY
ARRAY

ROW DEC

C=D C=£>ROW DEC

MEMORY
ARRAY

MEMORY
ARRAY

ROW DEC

MEMORY
ARRAY

u

MEMORY
ARRAY

MEMORY
ARRAY

MEMORY
ARRAY

Qu c=j) ROW DEC

MEMORY
ARRAY

(0

<x

DATA IN
BUFFER

DATA OUT
BUFFER

DIN

>DOUT

VBB GENERATOR

FUNCTIONAL DIAGRAM

02

DRAM ADD
A0 - A7

A7

A&

A5

RP3.RP4
G8-/1-

I 1

— l-^VSAr
— Hvw

C3 3 r

_A±_

A3

A2

. Al

-I— VW-

-HVNAr-

-Hwv-

10

RA5
CAS

R/w

D0-D7 |

IRQ «

RESEt I
BRE5ET |

ATN |
CST SENSE I

A0-AI5C

MUX

C34 -L

•22*fT
25V ^r

8

Vcc
A7

A6

A5

A4

A3

A2

Al

A0 u "

4164-2

RA5

C!A5

WE
D0 GND

C35 -L
.22^T

25V -±

UI2
4164-2

Dl 6K1D

.22^T

25V -±:

UI3
4IG4-2

D2 GND

C37 X
25V r±r

UI4
4164-2

D3 GND

"14 12 116 114 12 116 114 12 116 ]W|2

C38-L
.22^T

25V -i

UI5
4I&4-2

D4 GND

25V -±-

U\Q>
4164-2

'^f rj

D5 GND

C40 -L
.22^T

25V -±=

un

4IG4-2

DC 6ND

I

-O t5V

U18
4IG4-2

;jfFtj

D7 GND

5PARE5

74L50B

74L508

£E> £E>

74LS04

74-LS04

AI5

,AI2

.All

A 14 26

A13 23

ee

A}$_

21

A9

ZA

A8

A7

AG

V A5

l,A4_

ES5 20

MUX 27

12
II
112
17
113
1H
XII
110
16
15
14
13
115

18
10

un

R

Pi
FZ

'5 <FQgg-yq0F

"TF

17 02

C4I

r 24

23

22

21

20>

IS

J

X 18

s

6

Y2
I.B432

_L

"T 7

- li Is U <

25 C CS0

02 27

IRQ 26,

A0 13

D7
D6
D5
D4
D3
DZ
Dl
D0

+ 5V
15 | 2 fe55,A
lfc

CS0
T*D

DTR
RT5
R*C
DCD

XTAU D5R
R*D

XTAL2 CT5

(J> 2

U3

CSI

IRQ

RSI
R50

i _

REg R/W
Q A

+ 5V

°~TlTf

II

T 74L504 x 3

i£_

^

Q*5V

IOK

^

v^^-

FB63

45V (

£?i

14

17

D I6 $FDlg-$FDfF

Fgp l 3...* p ft a Q-1flftF l

6}FDpg»3FPP F

iflL

20

D7
DC
D5
D4
D3

D2 U5

Dl

D0

C5

28

FB&2

-A±

R/W
P7

P6

N.C. JS

I 652SB
1

P3
P2
PI
P0

"Jj^~

8

ATN

FB5S

+5V

FB6-4

FB6.5

00

KERW ADDR
CI.K

Kef PORT
CS

Plus 4 Schematic #310164 (3 of 4)

M

E
D
8
H
L
C
K

A.I

I2.M

I*
II

Z

>

r"

NC-
A12-
A7-
A6-
A5-
A4-
A3-
A2-
A1-
A0-
D1
D2-
D3-
GND

PIN

CONFIGURATION

I

■ 1 28

-vcc

- 2 27

-cs 3

■ 3 26

-A13

■ 4 25

-A8

- 5 24

-A9

- 6 23

-A11

7 23128 22

-CSi

- 8 21

-A10

- 9 20

-CS 2

- 10 19

-D8

-11 18

-D7

- 12 17

-D6

-13 16

-D5

-14 15

-D4

U23-31 8006-01

ROM - BASIC

PIN
CONFIGURATION

NC-
A12-
A7-
A6-
A5-
A4-
A3-
A2-
A1-
A0-
D1-
D2-
D3-
GND-

1

2

3

4

5

6

7

8

9

10

11

12

13

14

23128

28

-VCC

27

-CS 3

26

-A13

25

-A8

24

-A9

23

-A11

22

-CSi

21
20

-A10
-CS 2

19

-D8

18

-D7

17

-D6

16

-D5

15

-D4

U24-31 8005-04
ROM - KERNAL

CI LOW
CZ LOW

2. SOUND CARRIER SE.LECT (PAL ONLY) J1
SHORT 6.5 MHt FOR G. PAL
OPCKJ fc.OMHz FOR I. PAL
JUMPER SELECTION FOR Jl- J6>

A= 23128, 21128, 21L4

MOTES - UNLESS OTHERWISE SPECIFIED*

Plus 4 Schematic #310164 (4 of 4)

10

COLOR IN O-

LUtl IN

ta O-
C6

AUDIO IN O-

L t CI

-^n — it

COLOR. OUT

Lun OUT

COMP OUT

■w

W\L t

03 L^Lwpi^

-w-

** oc/r

O $*OOM£>

COMPONENT PARTS VALUE: R = fi, C = F, L = H

Q3, Q4: 2SC460 OR EQUIVALENT.

Q1. Q2: 2SC1684 OR EQUIVALENT.

D3, D4: 1SS198 OR EQUIVALENT.

D2 : 1 SS 1 1 OR EQUIVALENT.

D1 : 1 SS1 1 9 OR EQUIVALENT.

RCA. PHONO JACK,

TOP VIEW

G

er " &r "

"lT.JL.Ji

REAR VIEW

CH4- -*H — *~CH3
DETAIL (CH.SW)

NO.

TERMINALS

1

N.C.

2

AUDIO SIG. INPUT

3

+ B ( + 5V)

4

SYNC + LUM. SIG. INPUT

5

COLOR SIG. INPUT

6

COLOR SIG. OUTPUT

7

COMPO. SIG. OUTPUT

8

SYNC + LUM. SIG. OUTPUT

9

RF OUTPUT

10

CHANNEL SELECT SW.

RF Modulator Layout and Schematic #251844

11

COLOR IN O

LUtl JN O

LI CI

-^n — \[

COLOk OUT

AUDIO IN O

ta o— t

XF OUT

±-0$*00rt£>

COMPONENT PARTS VALUE: R = Q, C = F, L = H

Q3, Q4: 2SC460 OR EQUIVALENT.

Q1, Q2: 2SC1684 OR EQUIVALENT.

D3, D4: 1SS198 OR EQUIVALENT.

D2 : 1SS110 OR EQUIVALENT.

D1 : 1SS119 OR EQUIVALENT.

RCA. PHONO JACK

TOP VIEW

REAR VIEW

lip 1 '!

j Hiily

i

CH<£ m \ *

CH3

DETAIL (C//.SW)

NO.

TERMINALS

1

N.C.

2

AUDIO SIG. INPUT

3

+ B ( + 5V)

4

SYNC + LUM. SIG. INPUT

5

COLOR SIG. INPUT

6

COLOR SIG. OUTPUT

7

COMPO. SIG. OUTPUT

8

SYNC + LUM. SIG. OUTPUT

9

RF OUTPUT

10

CHANNEL SELECT SW.

RF Modulator Layout and Schematic #251311

12

s; commodore i

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